Friction-clutch



(No Model.)

D. MILLS.

PRIGTION CLUTCH. n No. 286,214. Patented Oct. 9, 1883.

wf TNESSES 2o side view.

Fricn,

FRlCTlON-CLUTCH.

SPECIFICATION forming part of Letters Patent N0.'286,214, dated October9, 1883.

Application filed March 5, 1883. (No model.)

To @ZZ whom t may concern:

Beit known that I, DANIEL MILLs, a citizen of the United States, and aresident of Philadelphia, Pennsylvania, have invented an Improvement inI+`rictionClutches, of which the. following is a specification.

My invention consists of an improvement in the constructionof that classoffriction-clutches in which a split ring and rimmed or flanged 1o wheelare combined with a pivoted lever for tary motion to a shaft, as in thefeed-motion of a sewing-machine, for instance.

In the accompanying drawings, Figure l is a perspective view of theseveral parts of the device detached from each other. Fig. 2 is a Fig. 3is a similar side view with the operating-lever in section, butindicated v by dotted lines and Fig. 4 is a view of a modiiication.

A is the shaft to which an intermittent ro- 2 5 tary motion is to beimparted through the medium of the devices hereinafter described, and onthis shaft is mounted. a wheel or disk, B, having an annular rim orflange, b. Within this rim is tted a split ring, D, in frictional 3ocontact with the rim. Aproj ection or arm, d,

necessary vibrating motion to the said lever.

'Ihe opposite end ofthe lever is provided with a lug or projection, F,which ,is adapted to occupy the space between the ends of the splitring, with a slight play between them. On im` 4o partingminotion in thedirection of the arrow,

Fig. 2, to the Aend of the lever E the ring D will immediately be causedto expand and bind firmly against the inner face of the rim of the wheelB, and cause the latter to turn of the lever E. On the return movementof the latter the ring will be released and will slip within the rim ofthe wheel, back motion of the wheel being prevented by a suitablefriction device, preferably applied to the pcriphery of the wheel. If,however, the split ring D does not in the first instance bear on theinterior of the rim b with a certain amount of friction, the movement ofthe lever E will simply cause the split ring to slip around within thewheel without expanding it sufficiently to bind against the rim. Inorder to insure, therefore, at all times a proper amount of frictionbetween the split ring and rim, I introducebetween the lug F and the endof the ring carrying the arm d a spring, f,which tends to keep the splitring always in sufficient frictional contact with the rim to insure thebinding of the ring against the rim when the lever E is moved in thedirection of the arrow, but which will allow the ring to slip with-l inthe rim on the return movement of the lever. l

In the device shown in Figs. l, 2, and 3 the springis of a helical form,and adapted to a pocket in the lug F, while in the device shown in Fig.4t the spring is of a somewhat modied form, which will be readilynnderstood without description.

I claim as my inventionto this speeication in the presence of twosubscribing witnesses.

DANL. MILLS.

Witnesses:

HARRY L. AsHnNFELTEn, HUBERT HowsoN,

The combination of a flanged wheel or disk l to an extent varying withthe extent of motion In testimony whereof I have signed my name y

